The creep who beat an elderly college professor into a coma at an Upper West Side bank ATM has been busted, police said.

The creep, who beat an elderly college professor into a coma at an Upper West Side bank ATM, claims to be suffering from amnesia or demons.

Matthew Lee, 50, who stole $300 from an 87-year-old victim after pummeling him at a Citibank on Broadway Sunday afternoon, offered some bizarre responses when reporters questioned him as he was hauled out of the the 24th Precinct on Wednesday night after cops busted him.

Lee then offered, "You have to talk to my lawyer. Something is not right. Bad spirits or something," when asked if he could dispute the footage police had of the vicious assault that left Kun Kim brain dead.

Police arrested Lee at his W. 90th St. home Wednesday.

Suspect Matthew Lee is taken from the 24th Precient to Manhattan Central Booking after being charged in the robbery and beating of an 87 year old man on the Upper West Side. ( Vic Nicastro for New York Daily News ) (Vic Nicastro/ for New York Daily News)

He is charged with robbery and assault.

One of Kun Kim's colleagues is still beside himself with grief.

"Dear God. This is Lehman professor Young Kun Kim. His son tells me is in a coma and in palliative care," Lehman College Associate Dean Christopher Malone tweeted Tuesday. "Our hearts weep. He is the most peaceful person on this planet."